【简答题】计算:(每小题5分,共20分) (1) ; (2) ; (3) ; (4)
【简答题】用3.50元买了10分、20分、50分三种邮票共18枚,其中10分邮票的总价与20分邮票的总价相同,则50分邮票共买了 _________ 枚.
【简答题】三、完形填空:(共20小题;每小题1分,满分20分) One day a mother rat and her babies were out in an open field. They were playing and having a good time when ___21___ a hungry cat came on the scene! It hid ___ 22 ___ a big...